Display
Size:
6.7 inches
6.5 inches
6.5 inches
Resolution:
2778 x 1284 pixels, 19.5:9 ratio, 458 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI
Technology:
OLED
IPS LCD
Super AMOLED
Screen-to-body:
87.45 %
79.20 %
87.37 %
Peak brightness:
1200 cd/m2 (nit)
Features:
60Hz refresh rate, HDR support, Oleophobic coating, Scratch-resistant glass (Ceramic Shield), Ambient light sensor, Proximity sensor
60Hz refresh rate, Ambient light sensor, Proximity sensor
60Hz refresh rate, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware
System chip:
Apple A14 Bionic
Mediatek Helio P35
Samsung Exynos 9611
Processor:
Hexa-core, 3100 MHz, 64-bit, 5 nm
Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm
Octa-core, 2300 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm
GPU:
Yes
PowerVR GE8320
Mali-G72 MP3
RAM:
6GB LPDDR5
3GB LPDDR4
4GB LPDDR4
Internal storage:
128GB (NVMe), not expandable
32GB (eMMC 5.1), available to use: 19.8 GB
128GB, available to use: 105.9 GB
Storage expansion:
microSDXC up to 512 GB
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
Smartphone
OS:
iOS (14.x)
Android (10), Samsung One UI
Android (11, 10), Samsung One UI
Battery
Capacity:
3687 mAh
4000 mAh
4000 mAh
Type:
Li - Ion, Not user replaceable
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Charging:
USB Power Delivery, Qi wireless charging, MagSafe wireless charging
Fast charging
Fast charging
Max charge speed:
Wireless: 15.0W
Wired: 15.0W
Camera
Rear:
Triple camera
Quad camera
Quad camera
Main camera:
12 MP (OIS, PDAF)
16 MP (PDAF)
48 MP (PDAF)
Specifications:
Aperture size: F1.6; Focal length: 26 mm; Pixel size: 1.7 μm
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Second camera:
12 MP (Telephoto, OIS, PDAF)
8 MP (Ultra-wide)
12 MP (Ultra-wide)
Specifications:
Optical zoom: 2.5x; Aperture size: F2.2; Focal Length: 65 mm
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 13 mm; Pixel size: 1.12 μm
Third camera:
12 MP (Ultra-wide)
2 MP (Macro)
5 MP (Macro)
Specifications:
Aperture size: F2.4; Focal Length: 13 mm
Aperture size: F2.4
Aperture size: F2.4; Focal Length: 40 mm
Fourth camera:
2 MP (Depth information)
5 MP (Depth information)
Specifications:
Aperture size: F2.4
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
Video recording:
3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (30 fps)
1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
Features:
OIS, HDR, Time-lapse video, Continuous autofocus, Picture-taking during video recording, Video light
Hyperlapse, EIS
Front:
12 MP (Time-of-Flight (ToF), EIS, HDR, Slow-motion videos)
13 MP
32 MP (HDR)
Video capture:
3840x2160 (4K UHD) (60 fps)
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
6.33 x 3.07 x 0.29 inches (160.84 x 78.09 x 7.39 mm)
6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)
6.24 x 2.90 x 0.31 inches (158.5 x 73.6 x 7.9 mm)
Weight:
8.03 oz (228.0 g)
6.81 oz (193.0 g)
6.07 oz (172.0 g)
Materials:
Back: Glass; Frame: Stainless steel
Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic
Materials & Colors:
Pacific blue, Gold, Silver, Graphite
Resistance:
Water, Splash, Dust; IP68
Biometrics:
3D Face unlock
Fingerprint (touch)
2D Face unlock, In-screen fingerprint
Keys:
Left: Volume control, Other; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Black
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue
Cellular
5G:
n1, n2, n3, n5, n7, n8, n12, n20, n25, n28, n38, n40, n41, n66, n71, n77, n78, n79, n260, n261, Sub-6, mmWave
LTE (FDD):
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 32(1500 L-band), 66(AWS-3), 71(600)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
LTE (TDD):
Bands 34(2000), 38(2600), 39(1900+), 40(2300), 41(2600+), 42(3500), 46, 48(3600)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 41(2600+)
UMTS:
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Data Speed:
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM:
Yes
SIM type:
Nano SIM, eSIM
Nano SIM
Nano SIM
HD Voice:
Yes
Yes
VoLTE:
Yes
Multimedia
Headphones:
No 3.5mm jack
3.5mm jack
3.5mm jack
Speakers:
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features:
Dolby Atmos
Dolby Atmos
Screen mirroring:
Wireless screen share
Wireless screen share
Wireless screen share
Radio:
FM
FM
Additional microphone(s):
for Noise cancellation
for Noise cancellation
Connectivity & Features
Bluetooth:
5.0
5.0
5.0
Wi-Fi:
802.11 a, b, g, n, ac, ax (Wi-Fi 6), dual-band; MIMO, Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
USB:
Lightning
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Features:
Charging, Headphones port
Charging
Charging, OTG
Location:
GPS, A-GPS, Glonass, Galileo, BeiDou, QZSS, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass, Barometer, LiDAR scanner
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Other:
NFC, UMA (Wi-Fi Calling)
NFC
NFC, ANT+
Hearing aid compatible:
M3, T4
M4, T3
Regulatory Approval
FCC approval:
Date approved:
Apr 17, 2020
Nov 28, 2019
Measured SAR:
Head:
0.42 W/kg
0.89 W/kg
Body:
1.27 W/kg
1.18 W/kg
Simultaneous Transmission:
1.27 W/kg
1.56 W/kg
Wireless Router:
1.27 W/kg
1.12 W/kg
Phablet:
2.76 W/kg
Buyers information
Price:
$ 1100
$ 250
$ 400
User Manual:
This is the official Samsung Galaxy A51 User Guide in English provided from the manufacturer.
In The Box:
USB‑C to Lightning Cable, Documentation
This is the official Samsung Galaxy A21 User Guide in English provided from the manufacturer.
Availability
Officially announced:
Oct 13, 2020
Apr 08, 2020
Dec 12, 2019
